package com.xiang.filter;

import com.xiang.wrapper.RepeatableReadRequestWrapper;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.util.StringUtils;

public class RepeatableReadRequestFilter implements Filter {

  @Override
  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) servletRequest;
    HttpServletResponse response = (HttpServletResponse) servletResponse;
    if (StringUtils.startsWithIgnoreCase(request.getContentType(), "application/json")) {
      RepeatableReadRequestWrapper requestWrapper = new RepeatableReadRequestWrapper(request, response);
      filterChain.doFilter(requestWrapper, response);
      return;
    }
    filterChain.doFilter(request, response);
  }
}
